/*
 * Copyright 2017-2021 Dromara.org
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.dromara.hmily.tac.sqlparser.model.common.segment.dml.order.item;

import lombok.Getter;
import lombok.ToString;
import org.dromara.hmily.tac.sqlparser.model.common.constant.HmilyOrderDirection;

/**
 * Order by item segment for expression.
 */
@Getter
@ToString(callSuper = true)
public final class HmilyExpressionOrderByItemSegment extends HmilyTextOrderByItemSegment {
    
    private final String expression;
    
    public HmilyExpressionOrderByItemSegment(final int startIndex, final int stopIndex, final String expression,
                                             final HmilyOrderDirection hmilyOrderDirection, final HmilyOrderDirection nullHmilyOrderDirection) {
        super(startIndex, stopIndex, hmilyOrderDirection, nullHmilyOrderDirection);
        this.expression = expression;
    }
    
    public HmilyExpressionOrderByItemSegment(final int startIndex, final int stopIndex, final String expression, final HmilyOrderDirection hmilyOrderDirection) {
        super(startIndex, stopIndex, hmilyOrderDirection, HmilyOrderDirection.ASC);
        this.expression = expression;
    }
    
    @Override
    public String getText() {
        return expression;
    }
}
